Wumuite
A valid IMA mineral species
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About Wumuite
Formula:
KAl0.33W2.67O9
Colour:
Light green
Lustre:
Adamantine, Vitreous
Hardness:
5 - 6
Specific Gravity:
6.52 (Calculated)
Crystal System:
Hexagonal
Name:
Named after the Wumu River, China near the type locality.
Type Locality:
Known synthetic analogue.
Unique Identifiers
Mindat ID:
52992
Long-form identifier:
mindat:1:1:52992:7
GUID
(UUID V4):
(UUID V4):
184b5164-16a3-4703-a08b-87e40cd3090a
IMA Classification of Wumuite
Approved
IMA Formula:
KAl0.33W2.67O9
Approval year:
2018
First published:
2020
Classification of Wumuite
4.DM.60
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
M : With large (+- medium-sized) cations; unclassified
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
M : With large (+- medium-sized) cations; unclassified
Mineral Symbols
As of 2021 there are now IMAâCNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Wum | IMAâCNMNC | Warr, L.N. (2021). IMAâCNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Wumuite
Adamantine, Vitreous
Transparency:
Transparent
Colour:
Light green
Streak:
White
Hardness:
5 - 6 on Mohs scale
Tenacity:
Brittle
Cleavage:
Distinct/Good
Parallel to {1010} and {0001}.
Parallel to {1010} and {0001}.
Density:
6.52 g/cm3 (Calculated)
Optical Data of Wumuite
Type:
Uniaxial (+)
Comments:
The GladstoneâDale relationship and the chemical constituent predict an average refraction index of 2.13.
Chemistry of Wumuite
Mindat Formula:
KAl0.33W2.67O9
Elements listed:
Crystallography of Wumuite
Crystal System:
Hexagonal
Class (H-M):
6/mmm (6/m 2/m 2/m) - Dihexagonal Dipyramidal
Space Group:
P6/mmm
Setting:
P6/mmm
Cell Parameters:
a = 7.2952(5) Å, c = 3.7711(3) Å
Ratio:
a:c = 1 : 0.517
Unit Cell V:
173.81 Ă
Âł
Z:
1
Morphology:
Tabular. Major {0001}, with minor {1010}, {0110}, and {1100}.
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 6.261 Ă | (36) |
| 3.727 Ă | (30) |
| 2.610 Ă | (10) |
| 3.161 Ă | (100) |
| 2.413 Ă | (40) |
| 1.881 Ă | (10) |
| 1.820 Ă | (15) |
| 1.577 Ă | (15) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 34 : Complex granite pegmatites |
Type Occurrence of Wumuite
General Appearance of Type Material:
light green hexagonal tabular crystals up to 0.3âmm in diameter
Place of Conservation of Type Material:
Geological Museum of China, 15 Xisi Mutton Alley, Beijing, China, registration No. M13782 (holotype), and the Crystal Structure Laboratory, China University of Geosciences, Beijing 100083, China, catalogue No.NY-6-2Z (cotype)
Geological Setting of Type Material:
Lightly-weathered biotiteâquartz monzonite (heavy mineral concentrates)
Associated Minerals at Type Locality:
Reference:
Xue, Y., Li, G., Xie, Y. (2020) Wumuite (KAl0.33W2.67O9) â a new mineral with an HTB-type structure from the PanzhihuaâXichang region in China. European Journal of Mineralogy: 32: 483â494.
Synonyms of Wumuite
Related Minerals - Strunz-mindat Grouping
| 4.DM. | Bahariyaite | KMnO4 |
| 4.DM.05 | Rankamaite | (Na,K)3(Ta,Nb,Al)11(O,OH)31 |
| 4.DM.05 | Sosedkoite | (K,Na)5Al2(Ta,Nb)22O60 |
| 4.DM.15 | Cesplumtantite | (Cs,Na)2(Pb,Sb3+)3Ta8O24 |
| 4.DM.20 | Eyselite | Fe3+Ge4+3O7(OH) |
| 4.DM.25 | Kuranakhite | PbMn4+Te6+O6 |
| 4.DM.30 | Gelosaite | BiMo6+(2-5x)Mo5+6xO7(OH) · H2O |
| 4.DM.30 | Mambertiite | BiMo5+2.80O8(OH) |
| 4.DM.35 | Ekebergite | ThFeNb2O8 |
| 4.DM.45 | Riesite | TiO2 |
| 4.DM.50 | Sardignaite | BiMo2O7(OH) · 2H2O |
| 4.DM.55 | Tewite | (K1.5â»0.5)(Te1.25W0.25â»0.5)W5O19 |
| 4.DM.60 | Kingsgateite | ZrMo6+2O7(OH)2 · 2H2O |
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Wumuite
mindat.org URL:
https://www.mindat.org/min-52992.html
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References for Wumuite
Reference List:
HĂ„lenius, U., Hatert, F., Pasero, M., Mills, S. J. (2018) CNMNC Newsletter No. 44, New minerals and nomenclature modifications approved in 2018. Mineralogical Magazine, 82 (4) 1015-1021 doi:10.1180/mgm.2018.148p.1018
Localities for Wumuite
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
â - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
China (TL) | |
| HĂ„lenius et al. (2018) +2 other references |
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Nanyang, Huaping County, Lijiang, Yunnan, China